Current state of the art brain-computer-interface (BCI) probes only around 1,000 neurons out of an estimated 86,000,000,000 neurons in the human brain. It will likely be a long time before it is possible technologically to probe each neuron in the human brain individually. On the other hand, behavioral data capture is progressing faster. An LLM can imitate a person's speaking style quite convincingly after hearing just 2 minutes of voice sample....
Originally asked by James on Stack Exchange (ai) (CC BY-SA 4.0).